
/* #login{
	position:absolute;
	width:100%;
	height:800px;
	left:0;
	top:0;
	z-index:90;
} 

h1{
	margin:30px auto;
	text-align:center;
	width:300px;
	background:transparent;
	font: 11px Copperplate;
	font-weight:700;
	word-spacing: 15px;
	height:40px;
	font-size:35px ;

}*/

.main{
	background:#ffffff;
	/*background:rgba(0, 0, 0, 0.6) none repeat scroll 0 0 !important;/*ʵ��FF����͸�������ֲ�͸��*/
    position:absolute;
    z-index:99;
	width: 100%;
	height:100%;
	word-spacing: 15px;
    border:0px solid #c0c0c0;
	}
.page-header{
	margin:25px 30px;
	
	}
.col-xs-6 {
    width: 30%;
    margin-left:120px;
    
}
.thumbnail{
	display:inline;
	border:0px solid #ddd;
}
.key{
	position:absolute;
	right:70px;
	width:50%;
	height:500px;
	background-color: #e0e0e0;
	border-top-left-radius: 3;
    border-bottom-left-radius: 3;
	border-top-right-radius: 3;
    border-bottom-right-radius: 3;
}
.btn-danger{
	position:absolute;
	margin:200px 200px;
	width:300px;
	height:100px;
	font-size: 28px;
}
.btn-default {
    color: #ffffff;
    background-color: #800000;
    border-color: #800000;
}
.btn-default:hover{
	color: #ffffff;
	background-color: #aa0000;
}
.btn-default:active{
	color: #ffffff;
	background-color: #800000;
}

.teacher_content{
	display:none;
	position:absolute;
	top:20px;
	left:10px;
	font-size:16px;
}